/Engine/Source/Runtime/Engine/Public/ObjectCacheEventSink.h
For parallel processing. Calling BeginQueueNotifyEvents will prevent notify events from being processed, an instead placed in a list for later processing. While other threads are actively updating the events, the main thread should process those events using this ProcessQueuedNotifyEvents When parallel processing is complete, calling EndQueueNotifyEvents will flush all events, and return to normal in place processing.
static void BeginQueueNotifyEvents()